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Crustacea, Isopoda, Oniscidea) of the Families Philosciidae and Scleropactidae from Brazilian Caves

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Crustacea, Isopoda, Oniscidea) of the Families Philosciidae and Scleropactidae from Brazilian Caves European Journal of Taxonomy 606: 1–38 ISSN 2118-9773 https://doi.org/10.5852/ejt.2020.606 www.europeanjournaloftaxonomy.eu 2020 · Campos-Filho et al. This work is licensed under a Creative Commons Attribution Licence (CC BY 4.0). Research article urn:lsid:zoobank.org:pub:95D497A6-2022-406A-989A-2DA7F04223B0 New species and new records of terrestrial isopods (Crustacea, Isopoda, Oniscidea) of the families Philosciidae and Scleropactidae from Brazilian caves Ivanklin Soares CAMPOS-FILHO 1,*, Camile Sorbo FERNANDES 2, Giovanna Monticelli CARDOSO 3, Maria Elina BICHUETTE 4, José Otávio AGUIAR 5 & Stefano TAITI 6 1,5 Universidade Federal de Campina Grande, Programa de Pós-Graduação em Engenharia e Gestão de Recursos Naturais, Av. Aprígio Veloso, 882, Bairro Universitário, 58429-140 Campina Grande, Paraíba, Brazil. 2,4 Universidade Federal de São Carlos, Departamento de Ecologia e Biologia Evolutiva, Rodovia Washington Luis, Km 235, 13565-905 São Carlos, São Paulo, Brazil. 3 Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Laboratório de Carcinologia, Av. Bento Gonçalves, 9500, Agronomia, 91510-979 Porto Alegre, Rio Grande do Sul, Brazil. 6 Istituto di Ricerca sugli Ecosistemi Terrestri, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, 50019 Sesto Fiorentino (Florence), Italy. 6 Museo di Storia Naturale, Sezione di Zoologia “La Specola”, Via Romana 17, 50125 Florence, Italy. * Corresponding author: [email protected] 2 Email: [email protected] 3 Email: [email protected] 4 Email: [email protected] 5 Email: [email protected] 6 Email: [email protected] 1 urn:lsid:zoobank.org:author:C752F864-3C84-4AF4-9EDA-4D1AF464D615 2 urn:lsid:zoobank.org:author:C8246067-8235-4981-87D8-56FD9C43FDC2 3 urn:lsid:zoobank.org:author:C829E5B7-B87E-4C4A-B88E-D5FE377AE60B 4 urn:lsid:zoobank.org:author:7B740115-BCA0-4711-8C9D-CD014FD3122B 5 urn:lsid:zoobank.org:author:8D91D781-EF49-42CC-B7AE-12789CB1CD71 6 urn:lsid:zoobank.org:author:62E97059-6AE5-4984-9ABB-7FB6F7358BD6 Abstract. After the examination of a large collection of Oniscidea from caves in the Brazilian states of Bahia, Minas Gerais, Pará, Sergipe and São Paulo, 12 species were recognized in the families Philosciidae and Scleropactidae. Four new species are described: Alboscia jotajota sp. nov. from the Açungui group; Androdeloscia akuanduba sp. nov. and Amazoniscus spica sp. nov. from the Carajás Formation; and Metaprosekia igatuensis sp. nov. from the Quadrilátero Ferrífero karst region. In addition, Atlantoscia inflata, Benthana longicornis, B. olfersii, B. picta and Paratlantoscia rubromarginata (Philosciidae) are recorded from Brazilian caves for the first time; andBenthana iporangensis, B. taeniata and Circoniscus bezzii (Scleropactidae) have the knowledge of their distribution extended to cave habitats. 1 European Journal of Taxonomy 606: 1–38 (2020) Keywords. Subterranean environment, Açungui group, Carajás Formation, Quadrilátero Ferrífero karst region, Neotropical. Campos-Filho I.S., Fernandes C.S., Cardoso G.M., Bichuette M.E., Aguiar J.O. & Taiti S. 2020. New species and new records of terrestrial isopods (Crustacea, Isopoda, Oniscidea) of the families Philosciidae and Scleropactidae from Brazilian caves. European Journal of Taxonomy 606: 1–38. https://doi.org/10.5852/ejt.2020.606 Introduction South America comprises twelve countries and four dependencies, with approximately 17.8 million km2. Despite this large extension, only 2% of its territory has suitable lithology for the development of karstic systems (Auler 2004, 2017). In the 19 karst areas of Brazil ca 18 000 caves are presently known (18% of the total estimated cave number, ca 100 000) (Auler 2002; CECAV 2015; Rubbioli et al. 2019). Most of these caves occur in carbonatic rocks, where the largest subterranean systems have been developed, and some in siliciclastic rocks. Moreover, non-karst cavities may occur in ferruginous and other types of rocks and sediments (Sallun Filho & Karmann 2012). Terrestrial isopods (Oniscidea) are one of the unique lineages among crustaceans completely adapted to a terrestrial way of life (Hornung 2011; Richardson & Araujo 2015; Taiti 2018). To date, more than 3700 species in 38 families are known worldwide (Javidkar et al. 2015; Sfenthourakis & Taiti 2015). The Oniscidea are among the most important macrofauna components in tropical habitats, including the Neotropical region (Leistikow 1999, 2001; Schmidt 2003, 2007; Campos-Filho et al. 2015a, 2017a; WoRMS 2019), where Philosciidae Kinahan, 1857 and Scleropactidae Verhoeff, 1938 are most abundant. To date, the Philosciidae comprise more than 500 species in 107 genera worldwide and the Scleropactidae include more than 100 species in 26 genera (Sfenthourakis & Taiti 2015; López- Orozco et al. 2016, 2017; Campos-Filho et al. 2018a; Carpio-Díaz et al. 2018; Taiti et al. 2018). Among the invertebrates collected in cave environments, the Oniscidea are one of the most representative groups (Trajano & Bichuette 2010; Gallão & Bichuette 2012, 2018; Silva & Ferreira 2015; Fernandes et al. 2019), and their presence is strictly related to the abiotic and biotic conditions of these environments, i.e., humidity, temperature stability and the variety of substrates such as guano and organic matter carried into the cave (Fernandes et al. 2019). To date, more than 300 troglobiotic species in 16 families of terrestrial isopods are known, mostly from the northern part of the globe (Taiti & Gruber 2008; Taiti & Xue 2012; Campos-Filho et al. 2014, 2016; Taiti 2014; Reboleira et al. 2015; Taiti & Montesanto 2018). In Brazil, more than 190 species of terrestrial isopods are known (Campos-Filho et al. 2018a, 2018b, 2019), of which 16 species are considered to be troglobionts (see Campos-Filho et al. 2018a, 2019; Fernandes et al. 2019). In this paper, four new species of terrestrial isopods are described in the families Philosciidae and Scleropactidae from Brazilian caves. In addition, Benthana longicornis Verhoeff, 1941, B. olfersii (Brandt, 1833), B. picta (Brandt, 1833) and Paratlantoscia rubromarginata Araujo & Leistikow, 1999 are recorded for the first time in cave habitats, and Benthana iporangensis Lima & Serejo, 1993, B. taeniata Araujo & Buckup, 1994 and Circoniscus bezzii Arcangeli, 1931 have the knowledge of their distributions extended to the subterranean environment. Material and methods Specimens were collected by active search and stored in 75% ethanol. Identifications and descriptions are based on morphological characters with the aid of micropreparations. For each new species, details on the type material, the description, etymology and remarks are given. For already known species, 2 CAMPOS-FILHO I.S. et al., Terrestrial isopods (Oniscidea) from Brazilian caves distribution and remarks, if necessary, are given. The synonymic list includes the original publication and only citations of records from Brazil. The complete references are available in Schmalfuss (2003) and Campos-Filho et al. (2018a). The illustrations of the habitus were obtained with the aid of a Sony DSC-W800 camera mounted on a Biofocus SQF-L-BI microscope. The appendages were illustrated with the aid of a camera lucida mounted on a CH2 Olympus microscope. Coordinates of the ʻnoduli lateralesʼ were obtained and illustrated as described in Vandel (1962). The final illustrations were prepared using the software GIMP (ver. 2.8) with the method proposed by Montesanto (2015, 2016). The material is deposited in the collections of the Laboratório de Estudos Subterrâneos, Universidade Federal de São Carlos, São Carlos (LES), and Museu de Zoologia, Universidade de São Paulo (MZUSP), both in the state of São Paulo, Brazil. Study Area Our study covered a large latitudinal extension of the Brazilian territory. The characteristics of climate, vegetation, geomorphology, biogeographic history and potential threats to the hypogean environments for each region are given below. Alto Ribeira karst area, state of São Paulo, southeastern Brazil The Alto Ribeira karst area (Fig. 1A–B) is one of the largest fragments of the Brazilian Atlantic forest protected by law and under Conservation Units. The presence of hydrographic basins, forests and a large number of caves in the region represents strategic strongholds of the endemic epigean and hypogean biodiversity (SEMA 1997). The region has the Atlantic forest as the main vegetation domain (Ab’Saber 1977). According to Koppen’s criteria (Alvares et al. 2013), the climate of the region is subtropical humid without a dry season, where lowlands and highlands have hot summers (Cfa) and temperate summers (Cfb), respectively. Our samples were collected in caves under the limits of two Conservation Units of Integral Protection, Parque Estadual Intervales (PEI) and Parque Estadual Turístico do Alto Ribeira (PETAR). The PEI covers the territories of Iporanga, Eldorado Paulista, Sete Barras and Ribeirão Grande, and is bordered by other Conservation Units, including PETAR, while PETAR covers the municipalities of Apiaí and Iporanga (SEMA 2006; Sallun & Sallun Filho 2009). Both parks have several different cave systems in Açungui group rocks, with Precambrian metasedimentary limestone outcrops discontinuously, intercalated with insoluble rocks (Karmann & Sánchez 1979). Currently, both parks face problems with uncontrolled tourism, land conflicts and pollution of subterranean drainage due to illegal mining and agriculture (Gallão & Bichuette 2018).
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